Multiple vulnerabilities in Apple Safari



Published: 2021-05-05
Risk Critical
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-30665
CVE-2021-30663
CWE ID CWE-119
CWE-190
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerability #2 is being exploited in the wild.
Vulnerable software
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Apple Safari
Client/Desktop applications / Web browsers

Vendor Apple Inc.

Security Advisory

1) Buffer overflow

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-30665

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in WebKit. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

install update from vendor's website.

Vulnerable software versions

Apple Safari: 14.0, 14.0.1, 14.0.2, 14.0.3, 14.0.3-14610.4.3.1.7, 14.0.3-15610.4.3.1.7, 14.1

CPE External links

https://support.apple.com/en-us/HT212340

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Integer overflow

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-30663

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in WebKit. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

install update from vendor's website.

Vulnerable software versions

Apple Safari: 14.0, 14.0.1, 14.0.2, 14.0.3, 14.0.3-14610.4.3.1.7, 14.0.3-15610.4.3.1.7, 14.1

CPE External links

https://support.apple.com/en-us/HT212340

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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